Quasi-Static Channel Estimation for Multiuser STBC-OFDM Systems

Author

Islam, Toufiqul ; Ahmed, Imtiaz ; Mallick, Shankhanaad ; Alam, Fakhrul ; Rahman, AndMd Saifur

Author_Institution

Dept. of Electr. & Electron. Eng., Bangladesh Univ. of Eng. & Technol., Dhaka

fYear

2006

fDate

19-21 Dec. 2006

Firstpage

68

Lastpage

71

Abstract

This paper proposes multiuser channel estimation techniques for space time block coded-orthogonal frequency division multiplexing (STBC-OFDM) systems based on simple blocked pilot grid. The estimation of multiuser channels is based on least square (LS) and minimum mean square estimation (MMSE) schemes. Simulation results, for a slowly faded quasi-static channel, reveal that the estimated characteristics closely agree with the actual channel characteristics. Comparison of LS and MMSE performance for various number of users is performed and different Doppler fading effects on MMSE performance are also presented.

Keywords

OFDM modulation; block codes; channel estimation; least mean squares methods; multiuser channels; space-time codes; Doppler fading effects; blocked pilot grid; least square scheme; minimum mean square estimation scheme; multiuser STBC-OFDM systems; multiuser channel estimation; multiuser channels; quasistatic channel estimation; slowly faded quasistatic channel; space time block coded-orthogonal frequency division multiplexing; Bandwidth; Channel estimation; Fading; MIMO; Multiuser channels; Multiuser detection; OFDM; Space technology; Transmitting antennas; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2006. ICECE '06. International Conference on

Conference_Location

Dhaka

Print_ISBN

98432-3814-1

Type

conf

DOI

10.1109/ICECE.2006.355292

Filename

4178410